Misfire detecting method and apparatus for an internal combustio

Details Misfire detecting method and apparatus for an internal combustio Misfire detecting method and apparatus for an internal combustio

1996-10-21

1997-06-17

Dombroske, George M.

Measuring and testing

Test stand

For engine

731173, 123419, 123436, 36443107, 36443108, F02D 100, G01M 1500

Patent

active

056399600

ABSTRACT:
A misfire detecting apparatus for an internal combustion engine in which erroneous decision as to occurrence of misfire is prevented regardless of engine rotation speed variation pattern. The apparatus includes a crank angle sensor (4) mounted on a crank shaft (2) of the internal combustion engine (1) for generating a crank angle signal (.theta.) for every predetermined crank angle of the engine (1), a rotation-speed variation detector (21, 22) for detecting variation in rotation of the internal combustion engine (1) on the basis of the crank angle signal (.theta.), a misfire decision means (23A) for determining occurrence of misfire on the basis of the variation in the rotation speed of the engine (1), a rotation-speed variation pattern decision means (41) for deciding whether or not a rotation-speed variation pattern representing the variation of the rotation speed of the engine matches with a predetermined pattern which indicates resonance with a driving system operatively coupled to the internal combustion engine, and a misfire decision inhibit means (42) for invalidating the misfire decision means (23A) when matching is found between the rotation-speed variation pattern and the predetermined pattern.

REFERENCES:
patent: 5222392 (1993-06-01), Baba et al.
patent: 5263453 (1993-11-01), Wakahara et al.
patent: 5311773 (1994-05-01), Bradshaw et al.
patent: 5357788 (1994-10-01), Kantschar et al.
patent: 5357790 (1994-10-01), Hosoya

Affiliated with

Also associated with

Rating

Misfire detecting method and apparatus for an internal combustio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Misfire detecting method and apparatus for an internal combustio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Misfire detecting method and apparatus for an internal combustio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2159360